mirror of
https://github.com/mpv-player/mpv
synced 2024-12-15 11:25:10 +00:00
463845e0db
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5604 b3059339-0415-0410-9bf9-f77b7e298cf2
115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/********************************************************************
|
|
*
|
|
* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
|
|
* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
|
|
* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
|
|
*
|
|
********************************************************************/
|
|
|
|
#include "xa_gsm.h"
|
|
|
|
|
|
typedef short word; /* 16 bit signed int */
|
|
typedef int longword; /* 32 bit signed int */
|
|
|
|
typedef unsigned short uword; /* unsigned word */
|
|
typedef unsigned int ulongword; /* unsigned longword */
|
|
|
|
typedef struct {
|
|
|
|
word dp0[ 280 ];
|
|
|
|
word z1; /* preprocessing.c, Offset_com. */
|
|
longword L_z2; /* Offset_com. */
|
|
int mp; /* Preemphasis */
|
|
|
|
word u[8]; /* short_term_aly_filter.c */
|
|
word LARpp[2][8]; /* */
|
|
word j; /* */
|
|
|
|
word ltp_cut; /* long_term.c, LTP crosscorr. */
|
|
word nrp; /* 40 */ /* long_term.c, synthesis */
|
|
word v[9]; /* short_term.c, synthesis */
|
|
word msr; /* decoder.c, Postprocessing */
|
|
|
|
char verbose; /* only used if !NDEBUG */
|
|
char fast; /* only used if FAST */
|
|
|
|
char wav_fmt; /* only used if WAV49 defined */
|
|
unsigned char frame_index; /* odd/even chaining */
|
|
unsigned char frame_chain; /* half-byte to carry forward */
|
|
} XA_GSM_STATE;
|
|
|
|
|
|
#define MIN_WORD (-32767 - 1)
|
|
#define MAX_WORD 32767
|
|
|
|
#define MIN_LONGWORD (-2147483647 - 1)
|
|
#define MAX_LONGWORD 2147483647
|
|
|
|
#ifdef SASR /* flag: >> is a signed arithmetic shift right */
|
|
#undef SASR
|
|
#define SASR(x, by) ((x) >> (by))
|
|
#else
|
|
#define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
|
|
#endif /* SASR */
|
|
|
|
|
|
|
|
/*
|
|
* Inlined functions from add.h
|
|
*/
|
|
|
|
/*
|
|
* #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \
|
|
* (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))
|
|
*/
|
|
#define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \
|
|
(SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
|
|
|
|
# define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \
|
|
(SASR( ((longword)(a) * (longword)(b)), 15 ))
|
|
|
|
# define GSM_L_MULT(a, b) /* word a, word b */ \
|
|
(((longword)(a) * (longword)(b)) << 1)
|
|
|
|
# define GSM_L_ADD(a, b) \
|
|
( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \
|
|
: (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
|
|
>= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \
|
|
: ((b) <= 0 ? (a) + (b) \
|
|
: (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
|
|
? MAX_LONGWORD : utmp))
|
|
|
|
/*
|
|
* # define GSM_ADD(a, b) \
|
|
* ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \
|
|
* ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
|
|
*/
|
|
/* Nonportable, but faster: */
|
|
|
|
#define GSM_ADD(a, b) \
|
|
((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
|
|
MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
|
|
|
|
# define GSM_SUB(a, b) \
|
|
((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
|
|
? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
|
|
|
|
# define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
|
|
|
|
/* Use these if necessary:
|
|
|
|
# define GSM_MULT_R(a, b) gsm_mult_r(a, b)
|
|
# define GSM_MULT(a, b) gsm_mult(a, b)
|
|
# define GSM_L_MULT(a, b) gsm_L_mult(a, b)
|
|
|
|
# define GSM_L_ADD(a, b) gsm_L_add(a, b)
|
|
# define GSM_ADD(a, b) gsm_add(a, b)
|
|
# define GSM_SUB(a, b) gsm_sub(a, b)
|
|
|
|
# define GSM_ABS(a) gsm_abs(a)
|
|
|
|
*/
|
|
|